Animal-shears



2 Sheets-Sheet 1.

(No Model.)

S. P. ALLEN. ANIMAL 'SHEARS.

Beitented Junw (No'ModeL) V v 2 Sheets Sh eet 2.

8-. P.- ALLEN.

ANIMAL SHEARS. No. 540,848. Patented June 11, 1895.

Tn: NORRIS PETERS izo, worauwov, wnsuma'rore, n. c.

- UNITE STATESP TEENT Erica.

SAMUEL FENTON ALLEN, OF CHICAGO, ILLINOIS.

ANIMAL-SH EARS.

SPECIFICATION forming part of Letters Patent No. 540,848, dated June 11,1895.

Application filed December 19. 1393. Serial No. 494,056. (lie medel.)

upper part, as illustrated, to accommodate a C otZZ whom it may concern:vibrator S pivoted by a stud bolt 9, prefer- Beitknown that I, SAMUELFENTON ALLEN, ably screwing into the frame 1. Extending of Chicago,county of Cook, State of Illinois, beyond the vibrator toward the combthe vihave invented certain new and useful 'Im- ,brating'armsterminatein dovetail ends 10 provements in Animal-Shears, of which theadapted to receive the correspondingly following is a specification,reference being shaped ends 11 of cutter blades 12. By'the had to theaccompanying drawings. vibration of the cutter blades acrossthe comb,

The objectof my invention isto produce an the machine is made to shearin the usual 69 improvement in animal shears by which the manner. Eachblade is provided with a breadth of cut of the machine may be inshoulder13 on its uppersurfacewhich works creased without interfering with theproper against a spring 14 that is secured in place operation of themachine. above the blades by a screw bolt 15, passing It also consistsin certain constructions and through an aperture 16 in the comb andscrewarrangements of the partsas will hereinafter ing into a screw hole17 in the frame 1. By more fully appear in the specification and meansof the bolt 15 the comb is securely will be succinctly set forth in theappended held in place upon the frame. The spring claims. securedthereby above the blades, serves, by

In the accompanying drawings, Figure 1 means of the shoulders 13, toprevent the is a top plan view of the machine with the separation of theblades from the vibrating cap removed. Fig. 2 is a side elevation ofarms,-except when it is desired'to remove the same with thecapincross-section. Fig. 3 them, when, by loosening the bolt 15, they sa bottom plan view of the frame and comb. may be readily withdrawn. Fig.4 is an end view thereof. Fig. oisaplan The object of employing aplurality of view of the comb detached. Fig. 6 is a plan blades in thesame cutter is to avoid that view of one of the blades detached. Fig. 7is shock to the mechanism which is experienced an end view thereof. Fig.8 is a side elevawhen a machine, having an extensive cutting tionthereof. Fig. 9 is an end view of the visurface workingin onedirection,isthrustinto brating armsdetached. Fig. 10 is a view ofmaterial to be sheared. 8c the blade-retaining spring detached. Fig. 1]vBy employing a plurality of separate outis a longitudinal view of theshaft partly in ting blades, I am able to-time the movement section.Fig. 12 is an end view of the shaftof each separately, therebyequalizing, as it head. Fig. 13 is a central vertical section of were,the force of the cutting blows, the stroke Fig. 11 on a line 12 12. Fig.let is a side eleof one cutterin my machine counterbalancing 8 5 vationof the vibrating disk detached. Fig. that of the other.. In order toreduce the pos- 15 is a side elevation of the vibrating-disk sibilityofashock of this sort to a stillgreater stud detached' Fig.16isaviewof theblades degree, I make the serrations between the and comb, illustratingthe teeth defined by teeth 18 of the blades 12 of different,preferserrations of regularly-graduated dept-hs,the ably regularlyincreasing, depths. By this or: graduation of the serrations beingsomewhat means the cut of the machine is made gradexaggerated. ual. Forexample, supposing the blade to be Referring to the figures on thedrawings, 1 moving outwardly across the comb, the inside indicates aframe made of suitable material tooth of each cutter will have nearlyfinished and preferably of the shape illustrated, its out before theoutside tooth has begun its 5 namely, having .at one end an upwardlyout. By the preferred arrangement, each incurved bracket support 2 andat the other termediate tooth has regular intermediate end dovetailstripsSinto which a correspondgraduations of cuts to perform. Whentheinglyshaped end 4 of a comb 5 is inserted blade moves in the oppositedirection, or inand by which it is securely he1d.- wardly, the operationis the same, except that 10c 6 and 7 indicate vibrating arms each piv-'it is reversed, as to the cutting sides. otally secured to the frame 1by a stud 8. 19 indicates a barrel or support for the Each of thevibrating arms is curved in its shaft 20. The shaft 20 is preferablycarried on ball bearings 21 within the barrel and is adapted, at itsouter end 22, to be connected with a flexible shaft. Not illustrated.

23 indicates a driving head secured to the shaft and carrying,preferably in ball bearings 24, a rotary eccentric 25. The eccentric isprovided with a smooth bore 26 that surrounds a stud 27 which is firmlyfixed, at its lower end, to the vibrator 8'.

By the rotation of the shaft 20 the driving head 23 is caused to revolveand to impart motion, through the eccentric and stud 27, to the vibrator8. The eccentric in its operation moves up and down upon the stud as thedriving head revolves. The vibrator S is operatively connected with thevibrating arms 6 and 7, as by pitmen 2S and 29, pivotallysecured to thevibrator, preferably on opposite sides of the central stud 9, asindicated at 30 and 31, respectively. The pitman 28 is pivoted, asindicated at 32, to the vibrating arm 6, and the pitman 29 is connectedin like manner to the vibrating arm 7, as indicated at 33.

The machine is preferably provided with a handle 34 secured, as by abolt 35, and nut 36, to a lug 37 through which the bolt passes. Thedriving mechanism is preferably covered by a cap 38 fitted over theparts and held in place by a nut 39 screwing upon the upper end of thevibrator stud 9 inserted through an aperture in the cap.

The operation of my machine is as follows: Rotation being imparted tothe shaft 20, in the manner above suggested, the driving head is causedto revolve at a high rate of speed to impart movement to the vibrator.It in turn actuates the vibrating arms which drive the blades 12backward and forward across the comb, the movements of the blades beingin opposite directions, counterbalancing each other, as hereinbeforesuggested.

I do not confine myself to the details of construction herein shown anddescribed, but reserve the right to modify and vary them at will withinthe scope of my invention.

What I claim is 1. In a shearing machine, the combination with a frameand comb, of a blade provided with teeth having their extremities inline with each other, said teeth being defined by serrations of varyingdepths regularly graduated from one side of the blade to the other,substantially as specified.

2. In a shearing machine, the combination with a frame and comb, of aplurality of opposltely moving blades provided, respectively, with teethdefined by serrations of regularly graduated depth, the extremities ofthe teeth upon both blades being in line and the serrations in therespective blades being graduated in opposite directions, substantiallyas specified.

3. In a shearing machine, the combination with aframe and comb, of aplurality of pivoted oscillatory vibrator arms, blades thereon, anoscillatory vibrator pivoted to the frame between the arms, an eccentricoperatively connected to the vibrator and means for actuating theeccentric, substantially as specified.

4. In a shearing machine, the combination with a frame, comb andvibrating arms, of a vibrator operatively connected with the vibratingarms, a stud upon the vibrator, a revoluble shaft, a driving headthereon, and an eccentric on the driving head loosely connected with thestud,all substantially as and for the purpose specified.

5. In a shearing machine, the combination with a frame and comb, ofvibrator arms pivoted thereto and provided with blades a vibratorpivoted to the frame, mechanism for imparting a vibratory motion to thevibrator, and pitmen, terminally pivoted to the vibrator upon theopposite sides of its pivot point and to the vibrator arms respectively,substantial'y as specified.

6. In a shearing machine, the combination with a frame, comb carried indove-tail bearings, vibrating arms, shouldered blades carried indove-tail recesses in the respective arms, a spring, and a bolt passingthrough the spring and the comb and screwing into the frame, allsubstantially as and for the purpose specified.

7. In a shearing machine, the combination with a frame and comb, of aplurality of pivoted oscillatory vibrator arms, blades thereon, anoscillatory vibrator pivoted to the frame between the arms, a revolubleshaft carried upon the frame and provided with a driving head, and aneccentric revolubly carried in the driving head and operativelyconnected to the vibrator, substantially as specified.

8. In a shearing machine, the combination with a frame and comb, of aplurality of pivoted oscillatory vibrator arms, blades thereon, anoscillatory vibrator pivoted to the frame between the arms andoperatively connected therewith, a shaft mounted in ball hearings in theframe and provided with a driving head and a stud upon the vibratorloosely connected to said eccentric, substantially as specified.

9. The combination with a frame and vibrator arms of a comb andshouldered blades removably secured to the frame and arms, respectively,by a bolt passing through the frame and comb and a spring secured to thebolt in front of the shoulders of and bearing against the blades,substantially as specified.

In testimony of all which I have hereunto subscribed my name.

SAMUEL FEN'ION ALLEN.

Witnesses:

SAML. W. ALLEN, CHARLES A. MCKELVAY.

